My brother is as as my sister.A. more hard-working B. most hard-working C. hard –working

问题补充：

My brother is as as my sister.

A. more hard-working B. most hard-working C. hard –working

答案：

解析：本题考查as......as用法，该短语常用于形容词或副词的比较级中的同级比较.as...as 中间要用形容词或副词的原级。本句句意为：我的弟弟和我妹妹一样努力学习。